Device for setting up and maintaining predetermined conditions in



A. A. SOMER-VILLE. DEVICE FOR 55mm UP4AND mmumme PREDETERMINED corwmmm mVARIOUS MEDIUMS.

. APPLICATION FILED FEB. 15. 1917.

Patented Nov. 4,1919.

anwwbo'z 45 such as steam and cold water, to a medium Bubstitiitetorapplication Serial No. 875,246, filed December 8, 1914. This applicationfiled February 15, v

UNITED STATES PATENT OFFICE.

' ALBERT A. sommtvrnm, or FLUSHING, mew Yonx, assreiroa'ro mamcm RUBBER.

COMPANY ,A CORPORATION OF MASSACHUSETTS.

DEVICE FOR SETTING UP AND MAINTAINING PREDETERMINED CONDITIONS INVARIOUS MEDIUMS. I

Specification 01' Letters Patent.

Patented Nov. 4, 1919.

1917. Serial No. 148,800}.

To all whom it mag concern:

Be it known that I, ALBERT A. SOMER- .VILLE, a citizen of the UnitedStates, residmined temperature pressure, vaccum, or

other conditions at the surface or in the interior of a chamber.

One of the objects of the invention is to provide a sim le device of thekind men tioned, in whic any variations from the desired predeterminedconditions may be quickly and efiiciently compensated and the s stemrestored to the no rmal. Another 0- ject is to provide a device of thekind mentioned in which regulation of a plurality of agents causinpredetermined desired variations may be e ected by thesame'control-member.

. This application is a continuation of my former application, SerialNo. 875,246, filed December 3, 1914.

In the accompanying drawing wherein one of the various possibleembodiments of the invention is shown: 7

Figure 1 is' a diagrammatic view of the device adapted to control thetemperature of a mill or calender roll, .and

Fig. 2 is a fragmentary, cross-sectional.

stated, my invention consists in the com ination of automatic means forapplying characteristically different agents such as the interiorchamber of a mill or calender roll, a d a control device. for regulatingthe automatic means comprising a mem er, in the present embodiment shownas a chart-like member similar to the chart employed in the Bristolrecordin devices, this member bei'n adapted to provide a predeterminedcon ition of temperature or other condition in the medium, afollowerortracer-finger coacting with the chart like member and-directlydetermining the operation of the automatic means for application of thefluids to the mill or similar roll, and a device, here shown as a heatsensitive device-affected by conditions in the interior of the roll,serving to control the followermember.

The apparatus shown in the drawing inings, there is shown an automaticsolenoidvalve mechanism comprising two solenoids A and C which areconnected by'the feed wires 24 and 26 with an-outside source of currentand which are alternatively operated by connections passing through theplate control-member as hereinafter set forth. Each of the solenoidmembers is to each of the solenoids through inlet-pipes 36, each ofwhich is attached to a head 35 of the solenoid and which communicateswith-the interior of the'solenoid by means of a channel passing throughthe head. This channel terminates in a valve-seat 34. The plungervalve-head 33 which is of magnetic material is adapted to move u anddown within the-chamber and is provided at either end with cone-shapedclosure members, one of which .is adapted to seat in the I valve-seat 34and the other of which is adapted. to seat in a valve-seat positioned atHold.

Adjacent the outlet port is a second out-- let port communicating with apipe 37. The solenoids are adapted to communicate respectively throughpipes 37 with the diaphragm control valves B- and D. The valve B isadapted to regulate a supply of steam assing through a line 27 to themill roll 22.

he valve D is adapted to regulate a supply of cold water or othercooling fluid passing through line 29 to the roll.

A control device for regulating the sole noid valves, in this embodimentshown as a chart-like plate having an appearance similar to the chart ofa Bristol recorder, is provided. This plate provides a series ofcontours which preferably constitute the boundar lines of zones ofconducting material. These zones are separated by a disk 17 ofnon-conducting material upon which is formed, as shown more clearly inFig. 2, a circuitous irregularly curved rib upon which is placed, flushwith the upper face of the rib, concentric conducting plates 18 and 19.The inner plate has an outer edge conformin to the shape of the inneredge 20 of the rib, and the outer plate has an inner edge correspondingto the outer edge 21 of the rib. Through the inner plate and the disk 17passes an aperture adapted to receive the ordinary spindle of themechanisnrl; which is, preferably, revolved by clock wor The rib is soformed that the edges 20 and 21 thereof coincide with respectivelyplotted curves representing time-temperature, time-pressure or othercurves based upon the occurrence of phenomena of predetermined rates. Asshown in the drawings, the width of the insulating rib varies so that avarying number of degrees of temperature-pressure or the like aretraversed in passing from one curve of the rib to the other one.

The plate 18 at the center of the control member and which, as showtn,lies against the curve representing the lower temperature to bemaintained, is electrically connected with the solenoid A by means of aclip connected to the plate to which is attached a loose wire secured toa binding post 25 which is attached to, but isolated from the outerframe 10 of the instrument.

From binding post 25- the line passes throu h the solenoid which isconnected in para'l el with a lamp 30 to prevent sparking. From thesolenoid A, a connection is made through the line 26 with one side ofthe current supply. The connection with the other side will behereinafter set forth.

The plate 19 is adapted to be connected in a similar manner through aclip, loose wire, binding-post 28 connected to but isolated from theframe 10 and through 'a line which connects the solenoid C in parallelwith a lamp 31 which also prevents sparking. The line passes from thesolenoid in a similar manner to the line 26.

A follower-finger 14 is adapted to swing.

back and forth across the control member and through its pen-likecontact point 15 to contact successively with the conducting andnon-conducting portions thereof, thereby establishing anddisestablishing connection with the solenoid-valve mechanism and thesource of current.

. Connection with the source of current supply and the solenoid-valvemechanism through the line 2 1 is made through the binding post 23attached to the frame 10 but isolated therefrom and a. metallic stripelectrically connected to the binding post and to the pivotal point ofthe follower-finger 1 1. The motion of the follower-finger back andforth across the control plate is secured through a helical or spiralpressure tube 13 of the Bourdon type. This tube is connected by means ofa vulcanizing tube 12 witha bulb 11 fitted with a sensitive gas, vaporor liquid, and mounted in the roll 22, adapted to respond to changingcondi-- tions therein.

The operation of the above device is as followszAssuming that theheating of the roll has commenced and the chart-like control-member andpen have been set at the initial temperature, namely, at the pointmarked 120 in dotted lines, the roll or other device which is beinheated will reach the temperature 120. T ereafter as long as thefollower-member 14; travels on the conducting plate 18, steam will beadmitted to the inclosure 22. Admission of the steam will be permittedthrough the energization of solenoidA through which the current flowsfrom line 24, binding post 23, follower-member 14:, plate 18, bindingpost 25, and thence to the line 26. Under said energization the plunger33 will be drawn up to seal the port 34, allowing a'ir passing from thedie. phragm-valve B to exhaust to the atmosphere through the pipe 37 andport 38. The diaphragm-valve being relieved of air pressure opens underthe pressure in the steam line admitting steam to the vulcanizer.Thereafter, due to various external agencies, for example, in connectionwith mill rolls, the friction of the rubber on the rolls or similarheat-developing action may cause a too rapid rise of the temperature ofthis roll. At such time the follower-member will, under the action ofthe pressure tube 13 be carried off the plate 18 in adirection from thecenter of the control-member toward the periphery. It will first pass tothe non-conductin rib on the disk 17 and thereby the circu1t heretoforementioned, will be broken, cutting off the supply of steam. Thevalve-mechanism at the time of the interruption of the current operatesthrough the dropping of the plunger 33 which exposes the port 34 therebyestablishing communication between the source of air supply and thediaphragm-valve, port 38 being sealed. The plunger is of a size topermit the passage of air thereabout.

If the temperature continues to rise after shutting oil of the steam-thefollower-finger will brlng th contact point upon the conducting plate.19 thereby closing the circuit through the solenoidC and applyingcoldwater, lowering the temperature of the bulb.

The circuit including the solenoid C will be established from the line QL'through the binding post 23, follower-finger 14, plate 19,binding'post 28 through the solenoid and back to the. wire 26'. Uponloweri the b cold water the on will travel backwardly on to the rib ofthe insulating member 17 and thence to the plate 18 whereupon steam willbe again admitted. The temperature within the medium is thus maintainedclose to the time temperature path, set out on the chart. The width ofthe strip; of insulating material 17 between the edges 20 and 21determines the temperature of variation between the maxi mum and minimumof any particular position of the pen and thistemperature of variationdepends upon the range of the recording thermometer or other sensitivedevice employed. --Inpractice the pen fluctuates across the strip ofiinsulating material between the plates 18 and 19 so that the make andbreak of the circuits controlli the steam and cooling agent go onpractically continuously, that is, the steam and cold water areseparately admitted every few moments.

v If the apparatus is desired to maintain a constant temperature atthebulb, the confronting edges 20 and 21 of the electrical conductinglates' may be made concentric circles, the size thereof depending uponthe range of the instrument and the temperature desired at the bulb. Orthis result may be accomplished by topping the clockwork mechanismordinarily used to revolve the chart by means of a mechanical stop setat a propen point, or otherwise, while the confronting edges 20 and. 21-of the electrical.

conductin plates may be made concentric spirals an the chart adjustedand clamped in such position on the clock face of the instrument thatthe pen will rest on. that part'of the path corresponding to the desiredtemperature at the bulb.

It will thus be seen that the apparatusi adapted to regulate quickly andefficiently var ations from the conditions which it is desired tomaintain in the chamber, and furthermore that the control of the variousfluids is effected through the use of a single control member.

As many apparently widely difleront embodiments of this invention may bemade without departing from the spirit thereof, it is to be understoodthat I do not'intend to limit myself to the'specific form of theinvention as set-forth except as indicated in the appended claims.

Having thus described my invention, what I claim and desire to protectby Letters Patent is:

' 1. In a device of the kind described, in combination, automatic meansfor applying characteristically different agents to a medium and acontrol device for regulating said automatic means comprising a memberadapted to provide a predetermined condition in said medium, afollower-member directly operated upon by said member and directlydetermining the operation of said automatic means and a device sensitiveto conditions in said medium and controlling said follower-member.

2. In a device of the kind described, in

combination, automatic-means for applying alternatively an' agent to setup a condition in a medium and an agent to chan the condition soset upand a control dev ce for regulating said automatic means comprising amember adapted to provide a predetermined condition in said chamber, a01- lower-member directly operated u on by characteristically differentsubstances to a. medium and acontrol device for regulating saidautomatic means comprising a member having a plurality of contoursadapted to provide a predetermined condition in said medium, afollower-member coacting therewith and directly determining theoperation of said automatic means and a device sensitive to conditionsin saidmedium and controlling said follower-member.

combination, an automatically operated valve mechanism for applyingcharacteristically different substances to a medium and a control devicefor regulating said auto matic mechanism comprising a member adapted toprovide a predetermined condition in said medium, a follower-member incontact with said-member and directly determining the operation of saidvalve-mechanism and a device sensitive to conditionsin said medlum andcontrolhng said fol-;

' for regulating said automatic means com- 4. In a device of the, kinddescribed, in I contours formed at the junction of zones of conductingand non-conducting material adapted to provide a predetermined conditionin said medium, a follower-member establishing and disestablishingcommunication with said automatic electrical means and a source ofcurrent through said zones, and a device sensitive to conditions in saidLnedium and controlling said follower-mem- 6. In a device of the kinddescribed, in combination, automatic electrical means for applyingcharacteristically difi'erent substances to a medium and a controldevice for regulating said automatic means comprising a member having aplurality of contours formed by the ed es of a band of non-conductingmateria%, establishing a range of desired conditions in the medium andplates of conducting material, a followmember establishing anddisestablishing communication with said automatic electrical means and asource of current through said conducting plates and a device sensitiveto conditions in said chamber and controlling said follower-member.

7. In a device of the kind described, in combination, an automaticsolenoid-valve mechanism for applying characteristically differentsubstances to a medium and a control plate for, regulating saidmechanism havin a circuitous band of non-conducting materialestablishing a range of predetermined conditions in a medium andseparatin concentric plates of conducting material, a ollower-fingeradapted to swing back and forth across said plate and to contactsuccessively with the conducting and non-conducting portions thereof,thereby establishing and d'isestablishing communication with thesolenoid valve mechanism and a source of current to allow the passagethrough the mechanism of one or another of said substances, and a devicesensitive to the conditions of said substances in said medium andserving to swing said follower-finger back and forth across said plate.

8. In a device of the kind described, in combination, an automaticsolenoid-valve mechanism for applying fluids of differingcharacteristics to a medium and a chart-like control plate forregulating said mechanism having a series of conducting andnon-conducting portions in electrical connection with saidsolenoid-valve mechanism, a followerfinger adapted to swing back andforth and to contact successively with thec'onducting and non-conductingportions of said plate and serving to establish and disestablishconnection thereby with said solenoid-valve mechanism and a source ofcurrent and a- Bourdon tube member operating upon said follower-fingerin accordance with changin conditions in said medium thereby to swingsaid finger back and forth across said and to contact successively withthe conducting and non-conductin ortions of said plate and serving toestablis and disestablish connection thereby with said solenoidvalvemechanism and a source of current, and a heat sensitive device connectedwith said medium operating upon said follower finger in accordance withchanging conditions in said chamber, thereby to swing said finger backand forth across said plate to apply alternately heating or coolinfluid.

10. In a device of the kind descri ed, in combination, automatic meansfor applying characteristically diiierent substances to a medium and acontrol device for regulating said automatic means com rising arotatable member adapted to provide a redetermined condition in saidmedium, a ollower memher in contact with said member and directlydeterminin the operation of said automatic means, a evice sensitive toconditions in said medium and controlling said followermember, and aclock-mechanism for rotating said rotatable member.

11.-In a device of the kind described, in combination, automaticelectrical means for applying characteristically difierent substances toa medium and a control device for regulating said automatic meanscomprising a rotatable member having a plurality of contours formed atthe junction of zones of conducting and non-conducting material adaptedto provide a predetermined condition in said chamber, a follower-memberestablishin and disestablishing communication wi't said automaticelectrical means and a source of current through said zones, a devicesensitive to conditions in said medium and controlling saidfollower-member, and a clock-control mechanism for rotating saidrotatable member.

12. In a temperature-regulating device, the combination with atemperature-responsive device and means for changing the temperature ofa device to be regulated, of a movable member having conductors thereonthe contours of which conformto the desired time-temperaturecharacteristics of the device to be regulated, and means dependent uponthe relative positions of the temperature-responsive device and themovable member for controlling the means for changing the tem erature. l1

13. 'I e combination with electro-responsive mechanism and a temperatureresponsive device, of a movable member having two spaced conductorsthereon, said con-- ductors being of such shape that the space betweenthe same corresponds to a predetermined time-temperature characterlstlc,nonconducting material in said space,time-c0nof December, 1916.

sponsive device is .caused to cotiperate with the movable member tocontrol the electro responslve -mechan1sm in accordance with thepredetermined time-temperature characteristic.

Signed-at New York, N. Y.', this 12th day ALBERT A. SOMERVILLE.

